linux/fs/ext4/ioctl.c
<<
>>
Prefs
   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 * linux/fs/ext4/ioctl.c
   4 *
   5 * Copyright (C) 1993, 1994, 1995
   6 * Remy Card (card@masi.ibp.fr)
   7 * Laboratoire MASI - Institut Blaise Pascal
   8 * Universite Pierre et Marie Curie (Paris VI)
   9 */
  10
  11#include <linux/fs.h>
  12#include <linux/capability.h>
  13#include <linux/time.h>
  14#include <linux/compat.h>
  15#include <linux/mount.h>
  16#include <linux/file.h>
  17#include <linux/quotaops.h>
  18#include <linux/random.h>
  19#include <linux/uuid.h>
  20#include <linux/uaccess.h>
  21#include <linux/delay.h>
  22#include <linux/iversion.h>
  23#include <linux/fileattr.h>
  24#include "ext4_jbd2.h"
  25#include "ext4.h"
  26#include <linux/fsmap.h>
  27#include "fsmap.h"
  28#include <trace/events/ext4.h>
  29
  30/**
  31 * Swap memory between @a and @b for @len bytes.
  32 *
  33 * @a:          pointer to first memory area
  34 * @b:          pointer to second memory area
  35 * @len:        number of bytes to swap
  36 *
  37 */
  38static void memswap(void *a, void *b, size_t len)
  39{
  40        unsigned char *ap, *bp;
  41
  42        ap = (unsigned char *)a;
  43        bp = (unsigned char *)b;
  44        while (len-- > 0) {
  45                swap(*ap, *bp);
  46                ap++;
  47                bp++;
  48        }
  49}
  50
  51/**
  52 * Swap i_data and associated attributes between @inode1 and @inode2.
  53 * This function is used for the primary swap between inode1 and inode2
  54 * and also to revert this primary swap in case of errors.
  55 *
  56 * Therefore you have to make sure, that calling this method twice
  57 * will revert all changes.
  58 *
  59 * @inode1:     pointer to first inode
  60 * @inode2:     pointer to second inode
  61 */
  62static void swap_inode_data(struct inode *inode1, struct inode *inode2)
  63{
  64        loff_t isize;
  65        struct ext4_inode_info *ei1;
  66        struct ext4_inode_info *ei2;
  67        unsigned long tmp;
  68
  69        ei1 = EXT4_I(inode1);
  70        ei2 = EXT4_I(inode2);
  71
  72        swap(inode1->i_version, inode2->i_version);
  73        swap(inode1->i_atime, inode2->i_atime);
  74        swap(inode1->i_mtime, inode2->i_mtime);
  75
  76        memswap(ei1->i_data, ei2->i_data, sizeof(ei1->i_data));
  77        tmp = ei1->i_flags & EXT4_FL_SHOULD_SWAP;
  78        ei1->i_flags = (ei2->i_flags & EXT4_FL_SHOULD_SWAP) |
  79                (ei1->i_flags & ~EXT4_FL_SHOULD_SWAP);
  80        ei2->i_flags = tmp | (ei2->i_flags & ~EXT4_FL_SHOULD_SWAP);
  81        swap(ei1->i_disksize, ei2->i_disksize);
  82        ext4_es_remove_extent(inode1, 0, EXT_MAX_BLOCKS);
  83        ext4_es_remove_extent(inode2, 0, EXT_MAX_BLOCKS);
  84
  85        isize = i_size_read(inode1);
  86        i_size_write(inode1, i_size_read(inode2));
  87        i_size_write(inode2, isize);
  88}
  89
  90void ext4_reset_inode_seed(struct inode *inode)
  91{
  92        struct ext4_inode_info *ei = EXT4_I(inode);
  93        struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
  94        __le32 inum = cpu_to_le32(inode->i_ino);
  95        __le32 gen = cpu_to_le32(inode->i_generation);
  96        __u32 csum;
  97
  98        if (!ext4_has_metadata_csum(inode->i_sb))
  99                return;
 100
 101        csum = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&inum, sizeof(inum));
 102        ei->i_csum_seed = ext4_chksum(sbi, csum, (__u8 *)&gen, sizeof(gen));
 103}
 104
 105/**
 106 * Swap the information from the given @inode and the inode
 107 * EXT4_BOOT_LOADER_INO. It will basically swap i_data and all other
 108 * important fields of the inodes.
 109 *
 110 * @sb:         the super block of the filesystem
 111 * @mnt_userns: user namespace of the mount the inode was found from
 112 * @inode:      the inode to swap with EXT4_BOOT_LOADER_INO
 113 *
 114 */
 115static long swap_inode_boot_loader(struct super_block *sb,
 116                                struct user_namespace *mnt_userns,
 117                                struct inode *inode)
 118{
 119        handle_t *handle;
 120        int err;
 121        struct inode *inode_bl;
 122        struct ext4_inode_info *ei_bl;
 123        qsize_t size, size_bl, diff;
 124        blkcnt_t blocks;
 125        unsigned short bytes;
 126
 127        inode_bl = ext4_iget(sb, EXT4_BOOT_LOADER_INO, EXT4_IGET_SPECIAL);
 128        if (IS_ERR(inode_bl))
 129                return PTR_ERR(inode_bl);
 130        ei_bl = EXT4_I(inode_bl);
 131
 132        /* Protect orig inodes against a truncate and make sure,
 133         * that only 1 swap_inode_boot_loader is running. */
 134        lock_two_nondirectories(inode, inode_bl);
 135
 136        if (inode->i_nlink != 1 || !S_ISREG(inode->i_mode) ||
 137            IS_SWAPFILE(inode) || IS_ENCRYPTED(inode) ||
 138            (EXT4_I(inode)->i_flags & EXT4_JOURNAL_DATA_FL) ||
 139            ext4_has_inline_data(inode)) {
 140                err = -EINVAL;
 141                goto journal_err_out;
 142        }
 143
 144        if (IS_RDONLY(inode) || IS_APPEND(inode) || IS_IMMUTABLE(inode) ||
 145            !inode_owner_or_capable(mnt_userns, inode) ||
 146            !capable(CAP_SYS_ADMIN)) {
 147                err = -EPERM;
 148                goto journal_err_out;
 149        }
 150
 151        down_write(&EXT4_I(inode)->i_mmap_sem);
 152        err = filemap_write_and_wait(inode->i_mapping);
 153        if (err)
 154                goto err_out;
 155
 156        err = filemap_write_and_wait(inode_bl->i_mapping);
 157        if (err)
 158                goto err_out;
 159
 160        /* Wait for all existing dio workers */
 161        inode_dio_wait(inode);
 162        inode_dio_wait(inode_bl);
 163
 164        truncate_inode_pages(&inode->i_data, 0);
 165        truncate_inode_pages(&inode_bl->i_data, 0);
 166
 167        handle = ext4_journal_start(inode_bl, EXT4_HT_MOVE_EXTENTS, 2);
 168        if (IS_ERR(handle)) {
 169                err = -EINVAL;
 170                goto err_out;
 171        }
 172        ext4_fc_start_ineligible(sb, EXT4_FC_REASON_SWAP_BOOT);
 173
 174        /* Protect extent tree against block allocations via delalloc */
 175        ext4_double_down_write_data_sem(inode, inode_bl);
 176
 177        if (inode_bl->i_nlink == 0) {
 178                /* this inode has never been used as a BOOT_LOADER */
 179                set_nlink(inode_bl, 1);
 180                i_uid_write(inode_bl, 0);
 181                i_gid_write(inode_bl, 0);
 182                inode_bl->i_flags = 0;
 183                ei_bl->i_flags = 0;
 184                inode_set_iversion(inode_bl, 1);
 185                i_size_write(inode_bl, 0);
 186                inode_bl->i_mode = S_IFREG;
 187                if (ext4_has_feature_extents(sb)) {
 188                        ext4_set_inode_flag(inode_bl, EXT4_INODE_EXTENTS);
 189                        ext4_ext_tree_init(handle, inode_bl);
 190                } else
 191                        memset(ei_bl->i_data, 0, sizeof(ei_bl->i_data));
 192        }
 193
 194        err = dquot_initialize(inode);
 195        if (err)
 196                goto err_out1;
 197
 198        size = (qsize_t)(inode->i_blocks) * (1 << 9) + inode->i_bytes;
 199        size_bl = (qsize_t)(inode_bl->i_blocks) * (1 << 9) + inode_bl->i_bytes;
 200        diff = size - size_bl;
 201        swap_inode_data(inode, inode_bl);
 202
 203        inode->i_ctime = inode_bl->i_ctime = current_time(inode);
 204
 205        inode->i_generation = prandom_u32();
 206        inode_bl->i_generation = prandom_u32();
 207        ext4_reset_inode_seed(inode);
 208        ext4_reset_inode_seed(inode_bl);
 209
 210        ext4_discard_preallocations(inode, 0);
 211
 212        err = ext4_mark_inode_dirty(handle, inode);
 213        if (err < 0) {
 214                /* No need to update quota information. */
 215                ext4_warning(inode->i_sb,
 216                        "couldn't mark inode #%lu dirty (err %d)",
 217                        inode->i_ino, err);
 218                /* Revert all changes: */
 219                swap_inode_data(inode, inode_bl);
 220                ext4_mark_inode_dirty(handle, inode);
 221                goto err_out1;
 222        }
 223
 224        blocks = inode_bl->i_blocks;
 225        bytes = inode_bl->i_bytes;
 226        inode_bl->i_blocks = inode->i_blocks;
 227        inode_bl->i_bytes = inode->i_bytes;
 228        err = ext4_mark_inode_dirty(handle, inode_bl);
 229        if (err < 0) {
 230                /* No need to update quota information. */
 231                ext4_warning(inode_bl->i_sb,
 232                        "couldn't mark inode #%lu dirty (err %d)",
 233                        inode_bl->i_ino, err);
 234                goto revert;
 235        }
 236
 237        /* Bootloader inode should not be counted into quota information. */
 238        if (diff > 0)
 239                dquot_free_space(inode, diff);
 240        else
 241                err = dquot_alloc_space(inode, -1 * diff);
 242
 243        if (err < 0) {
 244revert:
 245                /* Revert all changes: */
 246                inode_bl->i_blocks = blocks;
 247                inode_bl->i_bytes = bytes;
 248                swap_inode_data(inode, inode_bl);
 249                ext4_mark_inode_dirty(handle, inode);
 250                ext4_mark_inode_dirty(handle, inode_bl);
 251        }
 252
 253err_out1:
 254        ext4_journal_stop(handle);
 255        ext4_fc_stop_ineligible(sb);
 256        ext4_double_up_write_data_sem(inode, inode_bl);
 257
 258err_out:
 259        up_write(&EXT4_I(inode)->i_mmap_sem);
 260journal_err_out:
 261        unlock_two_nondirectories(inode, inode_bl);
 262        iput(inode_bl);
 263        return err;
 264}
 265
 266#ifdef CONFIG_FS_ENCRYPTION
 267static int uuid_is_zero(__u8 u[16])
 268{
 269        int     i;
 270
 271        for (i = 0; i < 16; i++)
 272                if (u[i])
 273                        return 0;
 274        return 1;
 275}
 276#endif
 277
 278/*
 279 * If immutable is set and we are not clearing it, we're not allowed to change
 280 * anything else in the inode.  Don't error out if we're only trying to set
 281 * immutable on an immutable file.
 282 */
 283static int ext4_ioctl_check_immutable(struct inode *inode, __u32 new_projid,
 284                                      unsigned int flags)
 285{
 286        struct ext4_inode_info *ei = EXT4_I(inode);
 287        unsigned int oldflags = ei->i_flags;
 288
 289        if (!(oldflags & EXT4_IMMUTABLE_FL) || !(flags & EXT4_IMMUTABLE_FL))
 290                return 0;
 291
 292        if ((oldflags & ~EXT4_IMMUTABLE_FL) != (flags & ~EXT4_IMMUTABLE_FL))
 293                return -EPERM;
 294        if (ext4_has_feature_project(inode->i_sb) &&
 295            __kprojid_val(ei->i_projid) != new_projid)
 296                return -EPERM;
 297
 298        return 0;
 299}
 300
 301static void ext4_dax_dontcache(struct inode *inode, unsigned int flags)
 302{
 303        struct ext4_inode_info *ei = EXT4_I(inode);
 304
 305        if (S_ISDIR(inode->i_mode))
 306                return;
 307
 308        if (test_opt2(inode->i_sb, DAX_NEVER) ||
 309            test_opt(inode->i_sb, DAX_ALWAYS))
 310                return;
 311
 312        if ((ei->i_flags ^ flags) & EXT4_DAX_FL)
 313                d_mark_dontcache(inode);
 314}
 315
 316static bool dax_compatible(struct inode *inode, unsigned int oldflags,
 317                           unsigned int flags)
 318{
 319        /* Allow the DAX flag to be changed on inline directories */
 320        if (S_ISDIR(inode->i_mode)) {
 321                flags &= ~EXT4_INLINE_DATA_FL;
 322                oldflags &= ~EXT4_INLINE_DATA_FL;
 323        }
 324
 325        if (flags & EXT4_DAX_FL) {
 326                if ((oldflags & EXT4_DAX_MUT_EXCL) ||
 327                     ext4_test_inode_state(inode,
 328                                          EXT4_STATE_VERITY_IN_PROGRESS)) {
 329                        return false;
 330                }
 331        }
 332
 333        if ((flags & EXT4_DAX_MUT_EXCL) && (oldflags & EXT4_DAX_FL))
 334                        return false;
 335
 336        return true;
 337}
 338
 339static int ext4_ioctl_setflags(struct inode *inode,
 340                               unsigned int flags)
 341{
 342        struct ext4_inode_info *ei = EXT4_I(inode);
 343        handle_t *handle = NULL;
 344        int err = -EPERM, migrate = 0;
 345        struct ext4_iloc iloc;
 346        unsigned int oldflags, mask, i;
 347        struct super_block *sb = inode->i_sb;
 348
 349        /* Is it quota file? Do not allow user to mess with it */
 350        if (ext4_is_quota_file(inode))
 351                goto flags_out;
 352
 353        oldflags = ei->i_flags;
 354        /*
 355         * The JOURNAL_DATA flag can only be changed by
 356         * the relevant capability.
 357         */
 358        if ((flags ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) {
 359                if (!capable(CAP_SYS_RESOURCE))
 360                        goto flags_out;
 361        }
 362
 363        if (!dax_compatible(inode, oldflags, flags)) {
 364                err = -EOPNOTSUPP;
 365                goto flags_out;
 366        }
 367
 368        if ((flags ^ oldflags) & EXT4_EXTENTS_FL)
 369                migrate = 1;
 370
 371        if ((flags ^ oldflags) & EXT4_CASEFOLD_FL) {
 372                if (!ext4_has_feature_casefold(sb)) {
 373                        err = -EOPNOTSUPP;
 374                        goto flags_out;
 375                }
 376
 377                if (!S_ISDIR(inode->i_mode)) {
 378                        err = -ENOTDIR;
 379                        goto flags_out;
 380                }
 381
 382                if (!ext4_empty_dir(inode)) {
 383                        err = -ENOTEMPTY;
 384                        goto flags_out;
 385                }
 386        }
 387
 388        /*
 389         * Wait for all pending directio and then flush all the dirty pages
 390         * for this file.  The flush marks all the pages readonly, so any
 391         * subsequent attempt to write to the file (particularly mmap pages)
 392         * will come through the filesystem and fail.
 393         */
 394        if (S_ISREG(inode->i_mode) && !IS_IMMUTABLE(inode) &&
 395            (flags & EXT4_IMMUTABLE_FL)) {
 396                inode_dio_wait(inode);
 397                err = filemap_write_and_wait(inode->i_mapping);
 398                if (err)
 399                        goto flags_out;
 400        }
 401
 402        handle = ext4_journal_start(inode, EXT4_HT_INODE, 1);
 403        if (IS_ERR(handle)) {
 404                err = PTR_ERR(handle);
 405                goto flags_out;
 406        }
 407        if (IS_SYNC(inode))
 408                ext4_handle_sync(handle);
 409        err = ext4_reserve_inode_write(handle, inode, &iloc);
 410        if (err)
 411                goto flags_err;
 412
 413        ext4_dax_dontcache(inode, flags);
 414
 415        for (i = 0, mask = 1; i < 32; i++, mask <<= 1) {
 416                if (!(mask & EXT4_FL_USER_MODIFIABLE))
 417                        continue;
 418                /* These flags get special treatment later */
 419                if (mask == EXT4_JOURNAL_DATA_FL || mask == EXT4_EXTENTS_FL)
 420                        continue;
 421                if (mask & flags)
 422                        ext4_set_inode_flag(inode, i);
 423                else
 424                        ext4_clear_inode_flag(inode, i);
 425        }
 426
 427        ext4_set_inode_flags(inode, false);
 428
 429        inode->i_ctime = current_time(inode);
 430
 431        err = ext4_mark_iloc_dirty(handle, inode, &iloc);
 432flags_err:
 433        ext4_journal_stop(handle);
 434        if (err)
 435                goto flags_out;
 436
 437        if ((flags ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) {
 438                /*
 439                 * Changes to the journaling mode can cause unsafe changes to
 440                 * S_DAX if the inode is DAX
 441                 */
 442                if (IS_DAX(inode)) {
 443                        err = -EBUSY;
 444                        goto flags_out;
 445                }
 446
 447                err = ext4_change_inode_journal_flag(inode,
 448                                                     flags & EXT4_JOURNAL_DATA_FL);
 449                if (err)
 450                        goto flags_out;
 451        }
 452        if (migrate) {
 453                if (flags & EXT4_EXTENTS_FL)
 454                        err = ext4_ext_migrate(inode);
 455                else
 456                        err = ext4_ind_migrate(inode);
 457        }
 458
 459flags_out:
 460        return err;
 461}
 462
 463#ifdef CONFIG_QUOTA
 464static int ext4_ioctl_setproject(struct inode *inode, __u32 projid)
 465{
 466        struct super_block *sb = inode->i_sb;
 467        struct ext4_inode_info *ei = EXT4_I(inode);
 468        int err, rc;
 469        handle_t *handle;
 470        kprojid_t kprojid;
 471        struct ext4_iloc iloc;
 472        struct ext4_inode *raw_inode;
 473        struct dquot *transfer_to[MAXQUOTAS] = { };
 474
 475        if (!ext4_has_feature_project(sb)) {
 476                if (projid != EXT4_DEF_PROJID)
 477                        return -EOPNOTSUPP;
 478                else
 479                        return 0;
 480        }
 481
 482        if (EXT4_INODE_SIZE(sb) <= EXT4_GOOD_OLD_INODE_SIZE)
 483                return -EOPNOTSUPP;
 484
 485        kprojid = make_kprojid(&init_user_ns, (projid_t)projid);
 486
 487        if (projid_eq(kprojid, EXT4_I(inode)->i_projid))
 488                return 0;
 489
 490        err = -EPERM;
 491        /* Is it quota file? Do not allow user to mess with it */
 492        if (ext4_is_quota_file(inode))
 493                return err;
 494
 495        err = ext4_get_inode_loc(inode, &iloc);
 496        if (err)
 497                return err;
 498
 499        raw_inode = ext4_raw_inode(&iloc);
 500        if (!EXT4_FITS_IN_INODE(raw_inode, ei, i_projid)) {
 501                err = ext4_expand_extra_isize(inode,
 502                                              EXT4_SB(sb)->s_want_extra_isize,
 503                                              &iloc);
 504                if (err)
 505                        return err;
 506        } else {
 507                brelse(iloc.bh);
 508        }
 509
 510        err = dquot_initialize(inode);
 511        if (err)
 512                return err;
 513
 514        handle = ext4_journal_start(inode, EXT4_HT_QUOTA,
 515                EXT4_QUOTA_INIT_BLOCKS(sb) +
 516                EXT4_QUOTA_DEL_BLOCKS(sb) + 3);
 517        if (IS_ERR(handle))
 518                return PTR_ERR(handle);
 519
 520        err = ext4_reserve_inode_write(handle, inode, &iloc);
 521        if (err)
 522                goto out_stop;
 523
 524        transfer_to[PRJQUOTA] = dqget(sb, make_kqid_projid(kprojid));
 525        if (!IS_ERR(transfer_to[PRJQUOTA])) {
 526
 527                /* __dquot_transfer() calls back ext4_get_inode_usage() which
 528                 * counts xattr inode references.
 529                 */
 530                down_read(&EXT4_I(inode)->xattr_sem);
 531                err = __dquot_transfer(inode, transfer_to);
 532                up_read(&EXT4_I(inode)->xattr_sem);
 533                dqput(transfer_to[PRJQUOTA]);
 534                if (err)
 535                        goto out_dirty;
 536        }
 537
 538        EXT4_I(inode)->i_projid = kprojid;
 539        inode->i_ctime = current_time(inode);
 540out_dirty:
 541        rc = ext4_mark_iloc_dirty(handle, inode, &iloc);
 542        if (!err)
 543                err = rc;
 544out_stop:
 545        ext4_journal_stop(handle);
 546        return err;
 547}
 548#else
 549static int ext4_ioctl_setproject(struct inode *inode, __u32 projid)
 550{
 551        if (projid != EXT4_DEF_PROJID)
 552                return -EOPNOTSUPP;
 553        return 0;
 554}
 555#endif
 556
 557static int ext4_shutdown(struct super_block *sb, unsigned long arg)
 558{
 559        struct ext4_sb_info *sbi = EXT4_SB(sb);
 560        __u32 flags;
 561
 562        if (!capable(CAP_SYS_ADMIN))
 563                return -EPERM;
 564
 565        if (get_user(flags, (__u32 __user *)arg))
 566                return -EFAULT;
 567
 568        if (flags > EXT4_GOING_FLAGS_NOLOGFLUSH)
 569                return -EINVAL;
 570
 571        if (ext4_forced_shutdown(sbi))
 572                return 0;
 573
 574        ext4_msg(sb, KERN_ALERT, "shut down requested (%d)", flags);
 575        trace_ext4_shutdown(sb, flags);
 576
 577        switch (flags) {
 578        case EXT4_GOING_FLAGS_DEFAULT:
 579                freeze_bdev(sb->s_bdev);
 580                set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
 581                thaw_bdev(sb->s_bdev);
 582                break;
 583        case EXT4_GOING_FLAGS_LOGFLUSH:
 584                set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
 585                if (sbi->s_journal && !is_journal_aborted(sbi->s_journal)) {
 586                        (void) ext4_force_commit(sb);
 587                        jbd2_journal_abort(sbi->s_journal, -ESHUTDOWN);
 588                }
 589                break;
 590        case EXT4_GOING_FLAGS_NOLOGFLUSH:
 591                set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
 592                if (sbi->s_journal && !is_journal_aborted(sbi->s_journal))
 593                        jbd2_journal_abort(sbi->s_journal, -ESHUTDOWN);
 594                break;
 595        default:
 596                return -EINVAL;
 597        }
 598        clear_opt(sb, DISCARD);
 599        return 0;
 600}
 601
 602struct getfsmap_info {
 603        struct super_block      *gi_sb;
 604        struct fsmap_head __user *gi_data;
 605        unsigned int            gi_idx;
 606        __u32                   gi_last_flags;
 607};
 608
 609static int ext4_getfsmap_format(struct ext4_fsmap *xfm, void *priv)
 610{
 611        struct getfsmap_info *info = priv;
 612        struct fsmap fm;
 613
 614        trace_ext4_getfsmap_mapping(info->gi_sb, xfm);
 615
 616        info->gi_last_flags = xfm->fmr_flags;
 617        ext4_fsmap_from_internal(info->gi_sb, &fm, xfm);
 618        if (copy_to_user(&info->gi_data->fmh_recs[info->gi_idx++], &fm,
 619                        sizeof(struct fsmap)))
 620                return -EFAULT;
 621
 622        return 0;
 623}
 624
 625static int ext4_ioc_getfsmap(struct super_block *sb,
 626                             struct fsmap_head __user *arg)
 627{
 628        struct getfsmap_info info = { NULL };
 629        struct ext4_fsmap_head xhead = {0};
 630        struct fsmap_head head;
 631        bool aborted = false;
 632        int error;
 633
 634        if (copy_from_user(&head, arg, sizeof(struct fsmap_head)))
 635                return -EFAULT;
 636        if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) ||
 637            memchr_inv(head.fmh_keys[0].fmr_reserved, 0,
 638                       sizeof(head.fmh_keys[0].fmr_reserved)) ||
 639            memchr_inv(head.fmh_keys[1].fmr_reserved, 0,
 640                       sizeof(head.fmh_keys[1].fmr_reserved)))
 641                return -EINVAL;
 642        /*
 643         * ext4 doesn't report file extents at all, so the only valid
 644         * file offsets are the magic ones (all zeroes or all ones).
 645         */
 646        if (head.fmh_keys[0].fmr_offset ||
 647            (head.fmh_keys[1].fmr_offset != 0 &&
 648             head.fmh_keys[1].fmr_offset != -1ULL))
 649                return -EINVAL;
 650
 651        xhead.fmh_iflags = head.fmh_iflags;
 652        xhead.fmh_count = head.fmh_count;
 653        ext4_fsmap_to_internal(sb, &xhead.fmh_keys[0], &head.fmh_keys[0]);
 654        ext4_fsmap_to_internal(sb, &xhead.fmh_keys[1], &head.fmh_keys[1]);
 655
 656        trace_ext4_getfsmap_low_key(sb, &xhead.fmh_keys[0]);
 657        trace_ext4_getfsmap_high_key(sb, &xhead.fmh_keys[1]);
 658
 659        info.gi_sb = sb;
 660        info.gi_data = arg;
 661        error = ext4_getfsmap(sb, &xhead, ext4_getfsmap_format, &info);
 662        if (error == EXT4_QUERY_RANGE_ABORT) {
 663                error = 0;
 664                aborted = true;
 665        } else if (error)
 666                return error;
 667
 668        /* If we didn't abort, set the "last" flag in the last fmx */
 669        if (!aborted && info.gi_idx) {
 670                info.gi_last_flags |= FMR_OF_LAST;
 671                if (copy_to_user(&info.gi_data->fmh_recs[info.gi_idx - 1].fmr_flags,
 672                                 &info.gi_last_flags,
 673                                 sizeof(info.gi_last_flags)))
 674                        return -EFAULT;
 675        }
 676
 677        /* copy back header */
 678        head.fmh_entries = xhead.fmh_entries;
 679        head.fmh_oflags = xhead.fmh_oflags;
 680        if (copy_to_user(arg, &head, sizeof(struct fsmap_head)))
 681                return -EFAULT;
 682
 683        return 0;
 684}
 685
 686static long ext4_ioctl_group_add(struct file *file,
 687                                 struct ext4_new_group_data *input)
 688{
 689        struct super_block *sb = file_inode(file)->i_sb;
 690        int err, err2=0;
 691
 692        err = ext4_resize_begin(sb);
 693        if (err)
 694                return err;
 695
 696        if (ext4_has_feature_bigalloc(sb)) {
 697                ext4_msg(sb, KERN_ERR,
 698                         "Online resizing not supported with bigalloc");
 699                err = -EOPNOTSUPP;
 700                goto group_add_out;
 701        }
 702
 703        err = mnt_want_write_file(file);
 704        if (err)
 705                goto group_add_out;
 706
 707        err = ext4_group_add(sb, input);
 708        if (EXT4_SB(sb)->s_journal) {
 709                jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
 710                err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
 711                jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
 712        }
 713        if (err == 0)
 714                err = err2;
 715        mnt_drop_write_file(file);
 716        if (!err && ext4_has_group_desc_csum(sb) &&
 717            test_opt(sb, INIT_INODE_TABLE))
 718                err = ext4_register_li_request(sb, input->group);
 719group_add_out:
 720        ext4_resize_end(sb);
 721        return err;
 722}
 723
 724int ext4_fileattr_get(struct dentry *dentry, struct fileattr *fa)
 725{
 726        struct inode *inode = d_inode(dentry);
 727        struct ext4_inode_info *ei = EXT4_I(inode);
 728        u32 flags = ei->i_flags & EXT4_FL_USER_VISIBLE;
 729
 730        if (S_ISREG(inode->i_mode))
 731                flags &= ~FS_PROJINHERIT_FL;
 732
 733        fileattr_fill_flags(fa, flags);
 734        if (ext4_has_feature_project(inode->i_sb))
 735                fa->fsx_projid = from_kprojid(&init_user_ns, ei->i_projid);
 736
 737        return 0;
 738}
 739
 740int ext4_fileattr_set(struct user_namespace *mnt_userns,
 741                      struct dentry *dentry, struct fileattr *fa)
 742{
 743        struct inode *inode = d_inode(dentry);
 744        u32 flags = fa->flags;
 745        int err = -EOPNOTSUPP;
 746
 747        ext4_fc_start_update(inode);
 748        if (flags & ~EXT4_FL_USER_VISIBLE)
 749                goto out;
 750
 751        /*
 752         * chattr(1) grabs flags via GETFLAGS, modifies the result and
 753         * passes that to SETFLAGS. So we cannot easily make SETFLAGS
 754         * more restrictive than just silently masking off visible but
 755         * not settable flags as we always did.
 756         */
 757        flags &= EXT4_FL_USER_MODIFIABLE;
 758        if (ext4_mask_flags(inode->i_mode, flags) != flags)
 759                goto out;
 760        err = ext4_ioctl_check_immutable(inode, fa->fsx_projid, flags);
 761        if (err)
 762                goto out;
 763        err = ext4_ioctl_setflags(inode, flags);
 764        if (err)
 765                goto out;
 766        err = ext4_ioctl_setproject(inode, fa->fsx_projid);
 767out:
 768        ext4_fc_stop_update(inode);
 769        return err;
 770}
 771
 772/* So that the fiemap access checks can't overflow on 32 bit machines. */
 773#define FIEMAP_MAX_EXTENTS      (UINT_MAX / sizeof(struct fiemap_extent))
 774
 775static int ext4_ioctl_get_es_cache(struct file *filp, unsigned long arg)
 776{
 777        struct fiemap fiemap;
 778        struct fiemap __user *ufiemap = (struct fiemap __user *) arg;
 779        struct fiemap_extent_info fieinfo = { 0, };
 780        struct inode *inode = file_inode(filp);
 781        int error;
 782
 783        if (copy_from_user(&fiemap, ufiemap, sizeof(fiemap)))
 784                return -EFAULT;
 785
 786        if (fiemap.fm_extent_count > FIEMAP_MAX_EXTENTS)
 787                return -EINVAL;
 788
 789        fieinfo.fi_flags = fiemap.fm_flags;
 790        fieinfo.fi_extents_max = fiemap.fm_extent_count;
 791        fieinfo.fi_extents_start = ufiemap->fm_extents;
 792
 793        error = ext4_get_es_cache(inode, &fieinfo, fiemap.fm_start,
 794                        fiemap.fm_length);
 795        fiemap.fm_flags = fieinfo.fi_flags;
 796        fiemap.fm_mapped_extents = fieinfo.fi_extents_mapped;
 797        if (copy_to_user(ufiemap, &fiemap, sizeof(fiemap)))
 798                error = -EFAULT;
 799
 800        return error;
 801}
 802
 803static long __ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 804{
 805        struct inode *inode = file_inode(filp);
 806        struct super_block *sb = inode->i_sb;
 807        struct user_namespace *mnt_userns = file_mnt_user_ns(filp);
 808
 809        ext4_debug("cmd = %u, arg = %lu\n", cmd, arg);
 810
 811        switch (cmd) {
 812        case FS_IOC_GETFSMAP:
 813                return ext4_ioc_getfsmap(sb, (void __user *)arg);
 814        case EXT4_IOC_GETVERSION:
 815        case EXT4_IOC_GETVERSION_OLD:
 816                return put_user(inode->i_generation, (int __user *) arg);
 817        case EXT4_IOC_SETVERSION:
 818        case EXT4_IOC_SETVERSION_OLD: {
 819                handle_t *handle;
 820                struct ext4_iloc iloc;
 821                __u32 generation;
 822                int err;
 823
 824                if (!inode_owner_or_capable(mnt_userns, inode))
 825                        return -EPERM;
 826
 827                if (ext4_has_metadata_csum(inode->i_sb)) {
 828                        ext4_warning(sb, "Setting inode version is not "
 829                                     "supported with metadata_csum enabled.");
 830                        return -ENOTTY;
 831                }
 832
 833                err = mnt_want_write_file(filp);
 834                if (err)
 835                        return err;
 836                if (get_user(generation, (int __user *) arg)) {
 837                        err = -EFAULT;
 838                        goto setversion_out;
 839                }
 840
 841                inode_lock(inode);
 842                handle = ext4_journal_start(inode, EXT4_HT_INODE, 1);
 843                if (IS_ERR(handle)) {
 844                        err = PTR_ERR(handle);
 845                        goto unlock_out;
 846                }
 847                err = ext4_reserve_inode_write(handle, inode, &iloc);
 848                if (err == 0) {
 849                        inode->i_ctime = current_time(inode);
 850                        inode->i_generation = generation;
 851                        err = ext4_mark_iloc_dirty(handle, inode, &iloc);
 852                }
 853                ext4_journal_stop(handle);
 854
 855unlock_out:
 856                inode_unlock(inode);
 857setversion_out:
 858                mnt_drop_write_file(filp);
 859                return err;
 860        }
 861        case EXT4_IOC_GROUP_EXTEND: {
 862                ext4_fsblk_t n_blocks_count;
 863                int err, err2=0;
 864
 865                err = ext4_resize_begin(sb);
 866                if (err)
 867                        return err;
 868
 869                if (get_user(n_blocks_count, (__u32 __user *)arg)) {
 870                        err = -EFAULT;
 871                        goto group_extend_out;
 872                }
 873
 874                if (ext4_has_feature_bigalloc(sb)) {
 875                        ext4_msg(sb, KERN_ERR,
 876                                 "Online resizing not supported with bigalloc");
 877                        err = -EOPNOTSUPP;
 878                        goto group_extend_out;
 879                }
 880
 881                err = mnt_want_write_file(filp);
 882                if (err)
 883                        goto group_extend_out;
 884
 885                err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count);
 886                if (EXT4_SB(sb)->s_journal) {
 887                        jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
 888                        err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
 889                        jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
 890                }
 891                if (err == 0)
 892                        err = err2;
 893                mnt_drop_write_file(filp);
 894group_extend_out:
 895                ext4_resize_end(sb);
 896                return err;
 897        }
 898
 899        case EXT4_IOC_MOVE_EXT: {
 900                struct move_extent me;
 901                struct fd donor;
 902                int err;
 903
 904                if (!(filp->f_mode & FMODE_READ) ||
 905                    !(filp->f_mode & FMODE_WRITE))
 906                        return -EBADF;
 907
 908                if (copy_from_user(&me,
 909                        (struct move_extent __user *)arg, sizeof(me)))
 910                        return -EFAULT;
 911                me.moved_len = 0;
 912
 913                donor = fdget(me.donor_fd);
 914                if (!donor.file)
 915                        return -EBADF;
 916
 917                if (!(donor.file->f_mode & FMODE_WRITE)) {
 918                        err = -EBADF;
 919                        goto mext_out;
 920                }
 921
 922                if (ext4_has_feature_bigalloc(sb)) {
 923                        ext4_msg(sb, KERN_ERR,
 924                                 "Online defrag not supported with bigalloc");
 925                        err = -EOPNOTSUPP;
 926                        goto mext_out;
 927                } else if (IS_DAX(inode)) {
 928                        ext4_msg(sb, KERN_ERR,
 929                                 "Online defrag not supported with DAX");
 930                        err = -EOPNOTSUPP;
 931                        goto mext_out;
 932                }
 933
 934                err = mnt_want_write_file(filp);
 935                if (err)
 936                        goto mext_out;
 937
 938                err = ext4_move_extents(filp, donor.file, me.orig_start,
 939                                        me.donor_start, me.len, &me.moved_len);
 940                mnt_drop_write_file(filp);
 941
 942                if (copy_to_user((struct move_extent __user *)arg,
 943                                 &me, sizeof(me)))
 944                        err = -EFAULT;
 945mext_out:
 946                fdput(donor);
 947                return err;
 948        }
 949
 950        case EXT4_IOC_GROUP_ADD: {
 951                struct ext4_new_group_data input;
 952
 953                if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg,
 954                                sizeof(input)))
 955                        return -EFAULT;
 956
 957                return ext4_ioctl_group_add(filp, &input);
 958        }
 959
 960        case EXT4_IOC_MIGRATE:
 961        {
 962                int err;
 963                if (!inode_owner_or_capable(mnt_userns, inode))
 964                        return -EACCES;
 965
 966                err = mnt_want_write_file(filp);
 967                if (err)
 968                        return err;
 969                /*
 970                 * inode_mutex prevent write and truncate on the file.
 971                 * Read still goes through. We take i_data_sem in
 972                 * ext4_ext_swap_inode_data before we switch the
 973                 * inode format to prevent read.
 974                 */
 975                inode_lock((inode));
 976                err = ext4_ext_migrate(inode);
 977                inode_unlock((inode));
 978                mnt_drop_write_file(filp);
 979                return err;
 980        }
 981
 982        case EXT4_IOC_ALLOC_DA_BLKS:
 983        {
 984                int err;
 985                if (!inode_owner_or_capable(mnt_userns, inode))
 986                        return -EACCES;
 987
 988                err = mnt_want_write_file(filp);
 989                if (err)
 990                        return err;
 991                err = ext4_alloc_da_blocks(inode);
 992                mnt_drop_write_file(filp);
 993                return err;
 994        }
 995
 996        case EXT4_IOC_SWAP_BOOT:
 997        {
 998                int err;
 999                if (!(filp->f_mode & FMODE_WRITE))
1000                        return -EBADF;
1001                err = mnt_want_write_file(filp);
1002                if (err)
1003                        return err;
1004                err = swap_inode_boot_loader(sb, mnt_userns, inode);
1005                mnt_drop_write_file(filp);
1006                return err;
1007        }
1008
1009        case EXT4_IOC_RESIZE_FS: {
1010                ext4_fsblk_t n_blocks_count;
1011                int err = 0, err2 = 0;
1012                ext4_group_t o_group = EXT4_SB(sb)->s_groups_count;
1013
1014                if (copy_from_user(&n_blocks_count, (__u64 __user *)arg,
1015                                   sizeof(__u64))) {
1016                        return -EFAULT;
1017                }
1018
1019                err = ext4_resize_begin(sb);
1020                if (err)
1021                        return err;
1022
1023                err = mnt_want_write_file(filp);
1024                if (err)
1025                        goto resizefs_out;
1026
1027                err = ext4_resize_fs(sb, n_blocks_count);
1028                if (EXT4_SB(sb)->s_journal) {
1029                        ext4_fc_mark_ineligible(sb, EXT4_FC_REASON_RESIZE);
1030                        jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
1031                        err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
1032                        jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
1033                }
1034                if (err == 0)
1035                        err = err2;
1036                mnt_drop_write_file(filp);
1037                if (!err && (o_group < EXT4_SB(sb)->s_groups_count) &&
1038                    ext4_has_group_desc_csum(sb) &&
1039                    test_opt(sb, INIT_INODE_TABLE))
1040                        err = ext4_register_li_request(sb, o_group);
1041
1042resizefs_out:
1043                ext4_resize_end(sb);
1044                return err;
1045        }
1046
1047        case FITRIM:
1048        {
1049                struct request_queue *q = bdev_get_queue(sb->s_bdev);
1050                struct fstrim_range range;
1051                int ret = 0;
1052
1053                if (!capable(CAP_SYS_ADMIN))
1054                        return -EPERM;
1055
1056                if (!blk_queue_discard(q))
1057                        return -EOPNOTSUPP;
1058
1059                /*
1060                 * We haven't replayed the journal, so we cannot use our
1061                 * block-bitmap-guided storage zapping commands.
1062                 */
1063                if (test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb))
1064                        return -EROFS;
1065
1066                if (copy_from_user(&range, (struct fstrim_range __user *)arg,
1067                    sizeof(range)))
1068                        return -EFAULT;
1069
1070                range.minlen = max((unsigned int)range.minlen,
1071                                   q->limits.discard_granularity);
1072                ret = ext4_trim_fs(sb, &range);
1073                if (ret < 0)
1074                        return ret;
1075
1076                if (copy_to_user((struct fstrim_range __user *)arg, &range,
1077                    sizeof(range)))
1078                        return -EFAULT;
1079
1080                return 0;
1081        }
1082        case EXT4_IOC_PRECACHE_EXTENTS:
1083                return ext4_ext_precache(inode);
1084
1085        case FS_IOC_SET_ENCRYPTION_POLICY:
1086                if (!ext4_has_feature_encrypt(sb))
1087                        return -EOPNOTSUPP;
1088                return fscrypt_ioctl_set_policy(filp, (const void __user *)arg);
1089
1090        case FS_IOC_GET_ENCRYPTION_PWSALT: {
1091#ifdef CONFIG_FS_ENCRYPTION
1092                int err, err2;
1093                struct ext4_sb_info *sbi = EXT4_SB(sb);
1094                handle_t *handle;
1095
1096                if (!ext4_has_feature_encrypt(sb))
1097                        return -EOPNOTSUPP;
1098                if (uuid_is_zero(sbi->s_es->s_encrypt_pw_salt)) {
1099                        err = mnt_want_write_file(filp);
1100                        if (err)
1101                                return err;
1102                        handle = ext4_journal_start_sb(sb, EXT4_HT_MISC, 1);
1103                        if (IS_ERR(handle)) {
1104                                err = PTR_ERR(handle);
1105                                goto pwsalt_err_exit;
1106                        }
1107                        err = ext4_journal_get_write_access(handle, sbi->s_sbh);
1108                        if (err)
1109                                goto pwsalt_err_journal;
1110                        lock_buffer(sbi->s_sbh);
1111                        generate_random_uuid(sbi->s_es->s_encrypt_pw_salt);
1112                        ext4_superblock_csum_set(sb);
1113                        unlock_buffer(sbi->s_sbh);
1114                        err = ext4_handle_dirty_metadata(handle, NULL,
1115                                                         sbi->s_sbh);
1116                pwsalt_err_journal:
1117                        err2 = ext4_journal_stop(handle);
1118                        if (err2 && !err)
1119                                err = err2;
1120                pwsalt_err_exit:
1121                        mnt_drop_write_file(filp);
1122                        if (err)
1123                                return err;
1124                }
1125                if (copy_to_user((void __user *) arg,
1126                                 sbi->s_es->s_encrypt_pw_salt, 16))
1127                        return -EFAULT;
1128                return 0;
1129#else
1130                return -EOPNOTSUPP;
1131#endif
1132        }
1133        case FS_IOC_GET_ENCRYPTION_POLICY:
1134                if (!ext4_has_feature_encrypt(sb))
1135                        return -EOPNOTSUPP;
1136                return fscrypt_ioctl_get_policy(filp, (void __user *)arg);
1137
1138        case FS_IOC_GET_ENCRYPTION_POLICY_EX:
1139                if (!ext4_has_feature_encrypt(sb))
1140                        return -EOPNOTSUPP;
1141                return fscrypt_ioctl_get_policy_ex(filp, (void __user *)arg);
1142
1143        case FS_IOC_ADD_ENCRYPTION_KEY:
1144                if (!ext4_has_feature_encrypt(sb))
1145                        return -EOPNOTSUPP;
1146                return fscrypt_ioctl_add_key(filp, (void __user *)arg);
1147
1148        case FS_IOC_REMOVE_ENCRYPTION_KEY:
1149                if (!ext4_has_feature_encrypt(sb))
1150                        return -EOPNOTSUPP;
1151                return fscrypt_ioctl_remove_key(filp, (void __user *)arg);
1152
1153        case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS:
1154                if (!ext4_has_feature_encrypt(sb))
1155                        return -EOPNOTSUPP;
1156                return fscrypt_ioctl_remove_key_all_users(filp,
1157                                                          (void __user *)arg);
1158        case FS_IOC_GET_ENCRYPTION_KEY_STATUS:
1159                if (!ext4_has_feature_encrypt(sb))
1160                        return -EOPNOTSUPP;
1161                return fscrypt_ioctl_get_key_status(filp, (void __user *)arg);
1162
1163        case FS_IOC_GET_ENCRYPTION_NONCE:
1164                if (!ext4_has_feature_encrypt(sb))
1165                        return -EOPNOTSUPP;
1166                return fscrypt_ioctl_get_nonce(filp, (void __user *)arg);
1167
1168        case EXT4_IOC_CLEAR_ES_CACHE:
1169        {
1170                if (!inode_owner_or_capable(mnt_userns, inode))
1171                        return -EACCES;
1172                ext4_clear_inode_es(inode);
1173                return 0;
1174        }
1175
1176        case EXT4_IOC_GETSTATE:
1177        {
1178                __u32   state = 0;
1179
1180                if (ext4_test_inode_state(inode, EXT4_STATE_EXT_PRECACHED))
1181                        state |= EXT4_STATE_FLAG_EXT_PRECACHED;
1182                if (ext4_test_inode_state(inode, EXT4_STATE_NEW))
1183                        state |= EXT4_STATE_FLAG_NEW;
1184                if (ext4_test_inode_state(inode, EXT4_STATE_NEWENTRY))
1185                        state |= EXT4_STATE_FLAG_NEWENTRY;
1186                if (ext4_test_inode_state(inode, EXT4_STATE_DA_ALLOC_CLOSE))
1187                        state |= EXT4_STATE_FLAG_DA_ALLOC_CLOSE;
1188
1189                return put_user(state, (__u32 __user *) arg);
1190        }
1191
1192        case EXT4_IOC_GET_ES_CACHE:
1193                return ext4_ioctl_get_es_cache(filp, arg);
1194
1195        case EXT4_IOC_SHUTDOWN:
1196                return ext4_shutdown(sb, arg);
1197
1198        case FS_IOC_ENABLE_VERITY:
1199                if (!ext4_has_feature_verity(sb))
1200                        return -EOPNOTSUPP;
1201                return fsverity_ioctl_enable(filp, (const void __user *)arg);
1202
1203        case FS_IOC_MEASURE_VERITY:
1204                if (!ext4_has_feature_verity(sb))
1205                        return -EOPNOTSUPP;
1206                return fsverity_ioctl_measure(filp, (void __user *)arg);
1207
1208        case FS_IOC_READ_VERITY_METADATA:
1209                if (!ext4_has_feature_verity(sb))
1210                        return -EOPNOTSUPP;
1211                return fsverity_ioctl_read_metadata(filp,
1212                                                    (const void __user *)arg);
1213
1214        default:
1215                return -ENOTTY;
1216        }
1217}
1218
1219long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
1220{
1221        long ret;
1222
1223        ext4_fc_start_update(file_inode(filp));
1224        ret = __ext4_ioctl(filp, cmd, arg);
1225        ext4_fc_stop_update(file_inode(filp));
1226
1227        return ret;
1228}
1229
1230#ifdef CONFIG_COMPAT
1231long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1232{
1233        /* These are just misnamed, they actually get/put from/to user an int */
1234        switch (cmd) {
1235        case EXT4_IOC32_GETVERSION:
1236                cmd = EXT4_IOC_GETVERSION;
1237                break;
1238        case EXT4_IOC32_SETVERSION:
1239                cmd = EXT4_IOC_SETVERSION;
1240                break;
1241        case EXT4_IOC32_GROUP_EXTEND:
1242                cmd = EXT4_IOC_GROUP_EXTEND;
1243                break;
1244        case EXT4_IOC32_GETVERSION_OLD:
1245                cmd = EXT4_IOC_GETVERSION_OLD;
1246                break;
1247        case EXT4_IOC32_SETVERSION_OLD:
1248                cmd = EXT4_IOC_SETVERSION_OLD;
1249                break;
1250        case EXT4_IOC32_GETRSVSZ:
1251                cmd = EXT4_IOC_GETRSVSZ;
1252                break;
1253        case EXT4_IOC32_SETRSVSZ:
1254                cmd = EXT4_IOC_SETRSVSZ;
1255                break;
1256        case EXT4_IOC32_GROUP_ADD: {
1257                struct compat_ext4_new_group_input __user *uinput;
1258                struct ext4_new_group_data input;
1259                int err;
1260
1261                uinput = compat_ptr(arg);
1262                err = get_user(input.group, &uinput->group);
1263                err |= get_user(input.block_bitmap, &uinput->block_bitmap);
1264                err |= get_user(input.inode_bitmap, &uinput->inode_bitmap);
1265                err |= get_user(input.inode_table, &uinput->inode_table);
1266                err |= get_user(input.blocks_count, &uinput->blocks_count);
1267                err |= get_user(input.reserved_blocks,
1268                                &uinput->reserved_blocks);
1269                if (err)
1270                        return -EFAULT;
1271                return ext4_ioctl_group_add(file, &input);
1272        }
1273        case EXT4_IOC_MOVE_EXT:
1274        case EXT4_IOC_RESIZE_FS:
1275        case FITRIM:
1276        case EXT4_IOC_PRECACHE_EXTENTS:
1277        case FS_IOC_SET_ENCRYPTION_POLICY:
1278        case FS_IOC_GET_ENCRYPTION_PWSALT:
1279        case FS_IOC_GET_ENCRYPTION_POLICY:
1280        case FS_IOC_GET_ENCRYPTION_POLICY_EX:
1281        case FS_IOC_ADD_ENCRYPTION_KEY:
1282        case FS_IOC_REMOVE_ENCRYPTION_KEY:
1283        case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS:
1284        case FS_IOC_GET_ENCRYPTION_KEY_STATUS:
1285        case FS_IOC_GET_ENCRYPTION_NONCE:
1286        case EXT4_IOC_SHUTDOWN:
1287        case FS_IOC_GETFSMAP:
1288        case FS_IOC_ENABLE_VERITY:
1289        case FS_IOC_MEASURE_VERITY:
1290        case FS_IOC_READ_VERITY_METADATA:
1291        case EXT4_IOC_CLEAR_ES_CACHE:
1292        case EXT4_IOC_GETSTATE:
1293        case EXT4_IOC_GET_ES_CACHE:
1294                break;
1295        default:
1296                return -ENOIOCTLCMD;
1297        }
1298        return ext4_ioctl(file, cmd, (unsigned long) compat_ptr(arg));
1299}
1300#endif
1301